title: Echocardiography in chronic cor pulmonale. Its value in early diagnosis compared with roentgenography and electrocardiography.
mesh_terms: D000328:Adult; D000368:Aged; D004452:Echocardiography; D004562:Electrocardiography; D006801:Humans; D008875:Middle Aged; D011660:Pulmonary Heart Disease / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography